docker_network: Adding basic integration test for overlay network (#47772)

Fixes #19271

test/integration/targets/docker_network/tasks/tests/overlay.yml

@@ -0,0 +1,56 @@
+---
+- name: Registering network name
+  set_fact:
+    nname_1: "{{ name_prefix ~ '-network-1' }}"
+- name: Registering network name
+  set_fact:
+    dnetworks: "{{ dnetworks }} + [nname_1]"
+
+####################################################################
+## overlay #########################################################
+####################################################################
+
+# Overlay networks require swarm initialization before they'll work
+- name: swarm
+  docker_swarm:
+    state: present
+    advertise_addr: 192.168.1.1
+
+- name: overlay
+  docker_network:
+    name: "{{ nname_1 }}"
+    driver: overlay
+    driver_options:
+      com.docker.network.driver.overlay.vxlanid_list: "257"
+  register: overlay_1
+
+- name: overlay (idempotency)
+  docker_network:
+    name: "{{ nname_1 }}"
+    driver: overlay
+    driver_options:
+      com.docker.network.driver.overlay.vxlanid_list: "257"
+  register: overlay_2
+
+- name: overlay (change)
+  docker_network:
+    name: "{{ nname_1 }}"
+    driver: bridge
+  register: overlay_3
+
+- name: cleanup network
+  docker_network:
+    name: "{{ nname_1 }}"
+    state: absent
+    force: yes
+
+- name: cleanup swarm
+  docker_swarm:
+    state: absent
+    force: yes
+
+- assert:
+    that:
+    - overlay_1 is changed
+    - overlay_2 is not changed
+    - overlay_3 is changed